1266361 has 4 divisors (see below), whose sum is σ = 1274112. Its totient is φ = 1258612.

The previous prime is 1266359. The next prime is 1266371. The reversal of 1266361 is 1636621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1266361 - 2¹ = 1266359 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1266301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3625 + ... + 3958.

It is an arithmetic number, because the mean of its divisors is an integer number (318528).

2^1266361 is an apocalyptic number.

It is an amenable number.

1266361 is a deficient number, since it is larger than the sum of its proper divisors (7751).

1266361 is an equidigital number, since it uses as much as digits as its factorization.

1266361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7750.

The product of its digits is 1296, while the sum is 25.

The square root of 1266361 is about 1125.3270635686. The cubic root of 1266361 is about 108.1896815259.

The spelling of 1266361 in words is "one million, two hundred sixty-six thousand, three hundred sixty-one".